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Alterations in the Microhardness of a Titanium Alloy Affected to a Series of Nanosecond Laser Pulses by Ushakov, Ivan; Simonov, Yuri; Bratan, S. is a Engineering article available to read on EtoBox.

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The alterations in the microhardness of a titanium alloy Ti85.85Al6.5Zr4Sn2Nb1Mo0.5Si0.15 subjected to laser treatment were investigated. Laser processing consists of a series of pulses with durations 20 ns. We used various methods of laser processing, which differed in power density, wavelength, geometrical pattern of irradiation and so on. The dependences of the microhardness on the load on the indenter were found. The laser processing modes providing the increased microhardness are determined. The investigations were carried out at loads from 0.49 N to 4.9 N, with maximum indentation depth of the Vickers pyramid up to 12 μm. Vickers microhardness can be increased by 20 – 40 %. At the same time, the plastic properties of the hardened layer are improved. The probability of crack formation during indentation of the initial alloy increased with a load on the indenter and reached 0.52 for a load of 4.9 N. In two of the treated areas of the three presented, crack formation was not recorded at any load. The mechanisms of hardening of the material surface layer under the influence of a laser pulse are discussed. Using the methods of computational mathematics, the character of sample hea

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Author

Ushakov, Ivan; Simonov, Yuri; Bratan, S.

Publisher

EDP Sciences; Les Ulis: EDP Sciences-Web of conferences, 2012-; Publons (ISSN 2261-236X)

Published

2019

Language

EN

Field

Engineering (Physical Sciences)